Shimmick Corp — Current Report (Form 8-K)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): April 28, 2026

Shimmick Corporation

(Exact name of Registrant as Specified in Its Charter)

Registrant’s Telephone Number, Including Area Code: (833) 723-2021

Not Applicable

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 5.02 Departure of Directors or Certain Officers, Election of Directors, Appointment of Certain Officer; Compensatory Arrangements of Certain Officers.

Sarah Tacker Appointment to Chief Operating Officer

On April 28, 2026 (the “Announcement Date”), Shimmick Corporation (the “Company”) announced the appointment of Sarah Tacker as the Company’s Executive Vice President, Chief Operating Officer, effective April 28, 2026 (the “Start Date”).

Ms. Tacker is joining Shimmick from FlatironDragados, where she began her 27 year career and most recently served as Vice President, District Manager, leading Northern California operations including business strategy, pursuit leadership, financial performance, client relationships and workforce development. Ms. Tacker also serves on the board of directors of the Associated General Contractors of California and collaborated with the Beavers Organization to establish the Women in Heavy Civil Committee of which she is a member. Ms. Tacker has a bachelor's degree in civil engineering from Tulane University.

Sarah Tacker Offer Letter

In connection with Ms. Tacker’s appointment as Chief Operating Officer, the Company provided an offer letter, dated as of March 24, 2026, which provides for the following key compensation and benefits:

Ms. Tacker will also enter into the Company’s standard form of indemnification agreement for directors and officers, a form of which was previously filed by the Company as Exhibit 10.1 to the Company’s Registration Statement on Form S-1/A on October 24, 2023.

There are no arrangements or understandings between Ms. Tacker and any other persons pursuant to which she was elected as an officer of the Company. There are also no family relationships between Ms. Tacker and any director or executive officer of the Company. Ms. Tacker has no direct or indirect material interest in any related party transaction required to be disclosed pursuant to Item 404(a) of Regulation S-K.

The foregoing summary of the Offer Letter is not complete and is subject to, qualified in its entirety by, and should be read in conjunction with, the full text of the Offer Letter, which is filed as Exhibit 10.1 to this Current Report on Form 8-K and incorporated herein by reference.

Item 8.01 Other Events.

On April 28, 2026, the Company issued a press release announcing Ms. Tacker’s appointment as Chief Operating Officer. A copy of the press release is furnished as Exhibit 99.1 hereto. This information is being furnished and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities under that Section, and shall not be deemed to be incorporated by reference into the filings of the Company under the Securities Act of 1933, as amended.

Item 9.01 Financial Statements and Exhibits.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.